Pin for printing-blocks.



H. nowsom. PIN FOR PRINTING BLOCKS. APPLICATION FILED FEB. 2311M].

Patented Jan. 8,1918.

Union as partner ora ion.

HENRY HOWSO'N, 0F PHILADELIHIA, PENNSYLVANIA, ASSIGNOE I30 TEE CONGOLEUM COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENNSYL- VANIA.

PIN FOR PRINTING-BLOOM.

Specification of Letters Patent.

Application filed February 23, 1917. Serial No. 150,394.

To all whom it may concern."

Be it known that I, HENRY Howson, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Pins for Printing- Blocks, of which the following is a specification.

My invention relates to certain improvements in the blocks of a block printing machine particularly adapted for depositing paint on surfaces such as felt, ploth, l1- noleum and like material.

The object of my invention is to design the pins so that agreater quantity of paint will be transferred from the roller, or other supplying device, to the surface of the material than can be transferred by a straight pin having smooth parallel sides, as it will be understood that the wear of the surface of the material depends upon the amount of paint deposited.

In the accompanying drawings;

Figure 1 is a sectional View of a portion of a printing block of a block printing machine illustrating my invention Fig. 2 is a sectional plan view on the line 2-2, Fig. 1;

Fig. 3 is a diagrammatic plan view showing the deposits of paint in dotted lines;

Figs. 4 to 7, inclusive, are diagrammatic views illustrating the different steps in the process of applying the paint to the surface of the material and Figs. 8 to 13, inclusive, are views illustrating modifications of the invention.

The pins, in the present instance, are cir cular in cross section. In a companion application filed by George Prifold, on February 28, 1916, Serial No. 80,878, and issued as a patent on March G, 1916, #1218361, :1 pin is shown having grooves on the outer surface for the paint. 1n the present design, the pins :1 have enlarged heads 6 forming shoulders which are preferably tapered, as shown at 0, so that when the roller d, carrying the paint, delivers the paint to the pins, as shown in Fig. 4, a portion of the paint will adhere to the tapered heads I), as shown in Fig. 5, so that when the pins deposit the paint on the material 6, Fig. 6, the deposit will be of a greater diameter than the pins and when the pins are withdrawn, as in Fig. i, the deposit will be of a considerable height, owing to the retention of the excess paint by the inclined walls of the pins. The pins are preferably arranged so that the deposits will be close together, as shown in Fig. 3, making a continuous wearing surface.

While I have shown the pins all of the same diameter and of an even distance apart, it will be understood that the pins may be of various diameters and the spacing". and arrangement of the pins will vary according to the designs to be produced.

It will also be under-stood that where the design is in several colors that the pins of one block may be arranged so as to have a given relation with those of another block so that when the design is completed practically the entire surface of the material is covered with the paint deposit.

In Figs. 8 and 9, I have illustrated a pin having an octagonal head I) instead of a round head, and in Figs. 10 and 11 I have shown a. tapered head b having vertical grooves therein, as called for in the above mentioned application.

In Fig. 12, I have shown a pin with a tapered head I) having a hole 9 therein into which a certain quantity of the paint will enter when the paint is transferred from the roller to the pin. This pin can be used when it is desired to. deposit a greater amount of paint than would be deposited by the pin shown in Fig. 1.

The pin having the perforation'therein v is claimed in a separate application filed by me even date herewith.

In assembling the pins on the base A, I preferably make the base of wood, or other suitable material, and drive the pins into the wood. The pins may be tapered for this purpose, but it will be understood that the pins may be secured to the base in any suitable manner Without departing from the essential features of the invention. It will also be understood that the amount of taper given to the head and the extent of the tapered portion will vary according to the size of the pin and the amount of material to be deposited thereon.

Patented Jan. 8, N918.

I claim: the body, said head serving as a carrier for l. A printing pin for a block printing a printing composition. 10 machine having a shoulder directly back of 3. A printing pin for a block printing the printing end and serving as a carrier machine having an enlarged head provided 6 for a printing composition. with a tapered shoulder, said head having a v 2. A printing pin for a block rinting plurality of grooves. machine having a head larger in diameter In Witness whereof I affix my signature. 15

than the body of the pin and tapered toward HENRY HOWSON. 

